This 7mm drag chain helps to maintain the life of wires used in numerous machines, including (but not limited to) CNC machines and 3D printers. The drag chains house wires/cables to stop them snagging on other parts of the machine. This drag chain is 7mm and comes as a 1 meter length.

how much is that i might need that for my printer

It is currently priced at 5.99 GBP. You can find it in the 3D printer / hardware section of our shop here:

http://hobbycomponents.com/211-hardware

If you have any problems finding a product listed in this forum in our shop (or vice versa) you can simply enter our SKU product code (will be in the format of HCxxxxxxxx) into the shop or forums search box and it should take you directly to the product.